| Name: | Shivani Gupta |
| Affiliation: | Indian Institute of Astrophysics |
| Conference ID : | ASI2024_207 |
| Title : | Magnetic Fields on different spatial scales of the L328 cloud |
| Authors : | Shivani Gupta1, Archana Soam1, Janik Karoly2, Chang Won Lee 3 |
| Authors Affiliation: | 1 Shivani Gupta, Archana Soam (Indian Institute of Astrophysics, II Block, Koramangala, Bengaluru 560034, India)
2 Janik Karoly ( Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE, UK)
3 Chang Won Lee (Korea Astronomy and Space Science Institute (KASI),776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea}) |
| Mode of Presentation: | Poster |
| Abstract Category : | Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Abstract : | L328 core with three sub-cores S1, S2, and S3 contains L328-IRS, a Very Low Luminosity Object(VeLLO). L328-IRS also shows a bipolar outflow traced in CO observations. By using JCMT/POL-2 submillimeter polarization measurements at 850 𝜇m, we mapped core scale magnetic fields (B-fields) in L328. The B-fields are ordered and very well connected from cloud to core scales i.e. from parsec-scale to sub-parsec-scale. The connection in B-field geometry is shown by using Planck dust polarization maps tracing large-scale
B-fields, optical and NIR polarisation observations tracing field line in the cloud envelope, and 850 𝜇m mapping cores-scale field geometry. The core-scale B-field strength estimated using the modified Davis-Chandrasekhar-Fermi relation is 278 ± 50𝜇G, which is ~12 times higher the envelope field strength found in previous study. This indicates that B-fields are getting stronger on smaller (sub-pc) scales. We also estimated magnetic energies and nonthermal kinetic energies in the envelope and core to check the importance of magnetic field and turbulence. The degree of polarization is steadily decreasing toward the denser part of the core with a power-law slope of -0.98 which is consistent to the ‘polarization hole’ seen in other cores. |
